![Optical disc drive for controlling laser emission](/abs-image/US/2007/02/13/US07177253B2/abs.jpg.150x150.jpg)
基本信息:
- 专利标题: Optical disc drive for controlling laser emission
- 专利标题(中):用于控制激光发射的光盘驱动器
- 申请号:US10524896 申请日:2003-10-06
- 公开(公告)号:US07177253B2 公开(公告)日:2007-02-13
- 发明人: Hiromichi Ishibashi , Tetsuya Shihara , Hisashi Senga , Toshio Matsumoto
- 申请人: Hiromichi Ishibashi , Tetsuya Shihara , Hisashi Senga , Toshio Matsumoto
- 申请人地址: JP Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Akin Gump Strauss Hauer & Feld, LLP
- 优先权: JP2002-302934 20021017
- 国际申请: PCT/JP03/12800 WO 20031006
- 国际公布: WO2004/036564 WO 20040429
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
In an optical disc drive, a laser light source emits a laser beam having an intensity changeable with the amount of drive current supplied. A first photodetector receives the laser beam reflected from an optical disc, thereby generating a readout signal. A second photodetector receives the laser beam, generates an electric signal representing the power of the laser beam received, and outputs the electric signal as a light quantity detection signal. A feedback control loop compares the level of the light quantity detection signal with a predetermined target value and regulates the drive current such that the level of the light quantity detection signal approaches the target value. In reading data from the optical disc, the target value is changed so as to compensate for a variation of the sensitivity of the second photodetector, thereby controlling the power of the laser beam emitted from the laser light source.
摘要(中):
在光盘驱动器中,激光光源发射具有随供给的驱动电流量而变化的强度的激光束。 第一光电检测器接收从光盘反射的激光束,从而产生读出信号。 第二光电检测器接收激光束,产生表示所接收的激光束的功率的电信号,并将该电信号作为光量检测信号输出。 反馈控制环路将光量检测信号的电平与预定目标值进行比较,并且调节驱动电流,使得光量检测信号的电平接近目标值。 在从光盘读取数据时,改变目标值以补偿第二光电检测器的灵敏度的变化,从而控制从激光光源发射的激光束的功率。
公开/授权文献:
- US20050254403A1 Optical disc drive 公开/授权日:2005-11-17
信息查询:
EspacenetIPC结构图谱:
G | 物理 |
--G11 | 信息存储 |
----G11B | 基于记录载体和换能器之间的相对运动而实现的信息存储 |
------G11B7/00 | 用光学方法,例如,用光辐射的热射束记录用低功率光束重现的;为此所用的记录载体 |